Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9b8ec2fd6afafb…

MALICIOUS

PDF

98.4 KB Created: 2021-08-02 12:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c315a0de30c478bc1fe5f3091a1111aa SHA-1: 20041290403310e9eaa5f6fc5b0a6513a2281764 SHA-256: ce9b8ec2fd6afafb6780fb958d38c7e3272b939e78aba1ee711566e204c9a1d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are associated with compromised content management systems or disposable hosting. The presence of 'utm_term' parameters in some URLs suggests a phishing or SEO manipulation tactic to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://infrive.ru/uplcv?utm_term=how+much+money+do+arena+football+players+make PDF link annotation
    • http://mjsolankifoundation.com/fck/imagesfile/sapofekowojixabitarabari.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a9a45156---bopisorilugag.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/muzobofawuwiso.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607e601e45d34---nunuvajapafepozafexubon.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a172682c0---zowijegas.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085e2035dc2e---54671938606.pdfIn PDF document text
    • http://fields-on-earth.com/fijinilusadunanaba.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/81396662492.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/wejifoturilud.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/22585682988.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/3bd01c2815a50878455c11329a894430/517211118.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609876e945391---pazunesuf.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/f5b033381da1c8b8c40ec317200f858b/50801530962.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/hkovg0gkvpejs7i8vifpe9l2b0/fifutijiliwodekowipuj.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1f322e77---40883911151.pdfIn PDF document text
    • http://synphabase.ch/upload/file/legovagokuzof.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72fc97699e---xinulijotiz.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0dce00861---15060728405.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/robuzifupamoxujedugi.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160838b2d1f220---11104190582.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/75536489499.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/picm3i4ias9q4k353elri316i0/puzitem.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/69566448610.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607791ef598bf---64767802374.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/v6m4n4o3vlctldtvgve514hcq9/suwabawi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B73 17464 bytes
SHA-256: d959648e184458e190035c2c5424b365b267ac17d62c29454db281f4dc74f9df
font_01_sfnt_off000148fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16112 11316 bytes
SHA-256: f9d9c8ede601082b191e0fafbbc472ae8e791be0208d9224ee70dc754564c2a6

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